Hello, ACPI 6.0 defines a new type in e820, AddressRangePersistentMemory (7), for NVDIMM. On a system with NVDIMM, kexec displays the following error message and sets it to RANGE_RESERVED as the fallback type. Unknown type (Persistent Memory) while parsing /sys/firmware/memmap/34/type. Please report this as bug. Using RANGE_RESERVED now. This new type is defined in "arch/x86/include/uapi/asm/e820.h" in 4.2-rc1 as follows. #define E820_PMEM 7 kexec needs to know this new type, but I think its build env includes "/usr/include/asm/e820.h", which is provided by a distribution. On Fedora 22, kernel-headers-4.0.6-300.fc22.x86_64 is the latest kernel header package and it will take a while for 4.2 headers. How do we handle such kernel header dependency in the kexec build env? Thanks, -Toshi
